What is the primary function of a switch in a network?

The primary function of a switch in a network is to connect devices and direct data packets. Switches operate at the data link layer of the OSI model, facilitating communication between various devices on the same local area network (LAN). When a data packet arrives at the switch, it uses the MAC addresses of the devices to determine the appropriate outgoing port for forwarding the data. This intelligent packet switching helps optimize network performance and reduces unnecessary traffic by ensuring that data only goes to its intended destination.

In contrast to the other options, amplifying signals is associated with repeaters or amplifiers, which are used to extend the range of a network but do not manage data packet connections. Managing IP addresses typically falls under the responsibilities of routers or DHCP servers, which allocate and track IP address assignments. Firewalls are dedicated devices or software solutions designed to monitor and filter traffic based on security rules, which is different from the core function of a switch in directing data packets among connected devices.